Chinese Geophysical Data Center, World Data Center. й

Author-submitted data information

ID 406
Title Waveforms and horizontal-to-vertical ratios around the direct P phase in P-wave receiver functions from the CIGSIP-1 array
Creator Xu Wang
Subject Waveforms and horizontal-to-vertical ratios of P-RFs
Publisher Xiukuan Zhao
Description To gain a better knowledge of sedimentary and crustal structures beneath the northwestern Iranian Plateau, we deployed a dense seismic array with 63 broadband stations operating from Oct/2013 to Oct/2014 under the project of “China-Iran Geological and Geophysical Survey in the Iranian Plateau (CIGSIP)”. These stations were equipped with Taurus or Reftek-130 digital seismographs and Trillium 120PA or Guralp CMG3ESP seismometers (50 Hz–120 s). Forty-six stations form a SW-NE-trending linear array with an average interval of ~10 km, and the others form two auxiliary profiles with an average interval of ~70 km. All the three profiles start in the southwest at the western border of Iran, cross the Zagros, SSZ, central Iran, and Alborz tectonic units, and terminate in the northeast at the southern coast of the South Caspian Basin. Earthquakes with magnitudes ≥5.0 and epicentral distances of 30°-90° were selected for the construction of P-wave receiver functions (P-RFs). A time-domain maximum entropy deconvolution with a water level of 0.001 and 11 different Gaussian parameters (agauss) was used to calculate the P-RFs. After careful visual inspection, 5321 P-RFs were selected for the structural inversion.
P-RF waveform files are finally stored in the directories as:
(e.g., ./PRF/E01/AG3/E01_13286_173245.eqr).
Waveforms and horizontal-to-vertical ratios of P-RFs (e.g., E01_synPw.dat; E01_synPr.dat) and their uncertainties (e.g., E01_stdPw.dat; E01_stdPw.dat) are estimated by a bootstrap method and finally stored in the ‘PwPr’ folder.
Contributor Ling Chen, Morteza Talebian, Yinshuang Ai, Mingming Jiang, Huajian Yao, Yumei He, Abdolreza Ghods, Farhad Sobouti, Bo Wan, Yang Chu, Guangbing Hou, Qi-Fu Chen, Sun-Lin Chung, Wenjiao Xiao, Fu-Yuan Wu, Rixiang Zhu
Date Oct. 2013 - Oct. 2014
Type To achieve efficient inversion and rational encompassing of the direct wave in P-RFs, waveforms and horizontal-to-vertical ratios are stored with a sampling rate of 20 Hz and a length of 4 sec. (2 s before to 2 s after the zero time). The zero time in P-RFs refers to the direct P-wave.
Format Vertical and radial P-RFs are stored in SAC format with ‘.eqz’ and ‘.eqr’ extensions, respectively. In the header of each SAC file, necessary information such as locations of station (STLA: latitude; STLO: longitude; STEL: elevation) and earthquake (EVLA, EVLO, EVDP), sampling interval (DELTA), and ray parameter (USER4) has been given. These standard SAC formats can be read using SAC, Obspy, MATLAB, et al. P-RF waveform and horizontal-to-vertical ratio files for inversion are in ASCII format. Gaussian parameter, ray parameter, sampling interval, delay time and sampling point relative to the zero time, and average waveform and ratio values are listed in each line of the waveform and ratio files, respectively.
DOI 10.12197/2022GA007
Language eng
Rights Institute of Geology and Geophysics, Chinese Academy of Sciences